RE: New to here
Buying B777 will have no bearing on the QANTAS (and can we all PLEASE spell it correctly, it stands for Queensland and Northern Territories Aerial Service in its initial guise)decision re the A3XX.
The B777 is a long haul, mid size, widebody for medium density routes. The A3XX will be a long haul oversize doubledeck widebody to be used for the most heavily trafficked routes and as a B747-400 replacement.
The aircraft would complement each other.